<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>

  <!-- link元素是用来引入资源 -->
  <!-- href -> hypertext reference -->
  <link rel="stylesheet" href="./css/style.css">
  <link rel="stylesheet" href="./css/test.css">
</head>
<body>
  
  <h1>我是h1元素</h1>
  <div class="title">我是01中的title</div>

</body>
</html>